GMPP Stage I
 

I am looking at Stage 1 for my balt. I want the extra power, but do not find it necessary to pay an extra $200 for a pully. Anyone have stage I and is the increase in power noticable and worth the money to save warranty? Any input would be appreciated.

Well...if you look at the dyno it seems to basically be a reflash for the 7000 rpm redline. the injectors give it enough fuel to rev. If you are looking for warranty and power go stage 2

yes you will feel a diff.

how much warranty do you even have left? You'll end up needing a new belt and tune if you got the pulley on the side anyway, which would be about 200 bucks.